Thursday

October 8, 2015
Total # Posts: 674

**Chemistry**

Cocaine is a non-electrolyte that has a molecular weight of 303.4 g/mole. How many grams must be dissolved in 25.0 mL of Chloroform (density = 1.484 g/mL) to raise its boiling point to 65.5 Celsius? The boiling point of pure Chloroform is 61.2 Celsius. Kb Chloroform = 3.62 ...
*February 26, 2012*

**calculus**

the area of the first quadrant bounded by the y-axis, the line y=4-x, and the graph of y=x-cosx is approximately
*February 26, 2012*

**chemistry**

An aqueous salt solution is formed by adding 11.67 g sodium sulfate (solute) to water (solvent). What mass (in g) of water is used if the freezing point of the solution is -12.9 oF. Kf H2O = 1.86 oC/m I know to use delta T= i*Kf*m I then solve for m. But, then I'm confused...
*February 26, 2012*

**calculus**

the area of the first quadrant bounded by the y-axis, the line y=4-x, and the graph of y=x-cosx is approximately
*February 26, 2012*

**statistics**

THIS WAS MY ANSWER a)Identify the population and the sample. N (population) is ALL phones produced per day n (sample) is 40 random phones from the day’s production b) Is the population parameter in this study known or unknown? Explain. UNKNOWN - Parameter is the numerical...
*February 22, 2012*

**statistics**

A manufacturer of cell phones has decided that an assembly line will be considered to be operating satisfactorily if less than 0.02% of the phones produced per day are defective. To check the quality of a day's production, the company decides to randomly sample 40 phones ...
*February 22, 2012*

**Chemistry**

Can someone confirm the answer for this. I worked it out and got an answer of 85.5 torr. Is this right? Can someone please put the answer to this so I can check. Thanks. That would be helpful.
*February 18, 2012*

**Com arts**

In the Book FareWell to Manzanar. What chapter did momma break her dishes?
*February 14, 2012*

**physics**

A certain projectile is launched with an initial speed Vo. At its highest point its speed is Vo / 6. What was the launch angle?
*February 9, 2012*

**PhysicsIn what direction relative to north must ca**

An astronaut on the planet Zircon tosses a rock horizontally with a speed of 6.65 . The rock falls through a vertical distance of 1.50 and lands a horizontal distance of 8.90 from the astronaut. What is the acceleration of gravity on Zircon?
*February 9, 2012*

**PhysicsIn what direction relative to north must ca**

Two canoeists start paddling at the same time and head toward a small island in a lake, as shown in the figure . Canoeist 1 paddles with a speed of 1.60 at an angle of 45 north of east. Canoeist 2 starts on the opposite shore of the lake, a distance of 1.5 due east of canoeist...
*February 9, 2012*

**Algebra**

In order to solve this problem, you would have to distribute the negative (- sign) to the (x-2), making the problem x+2-x+2. The two x's would cancel out, therefore making the final answer 4.
*February 6, 2012*

**math**

The answer would be 7x+3y. The reason for this, is because you have to combine the "like" terms (8x goes with -x; -2y goes with 5y).
*February 6, 2012*

**science**

you get on the beach ball and float
*January 25, 2012*

**Physics**

2.5 m/s
*January 18, 2012*

**math**

NEVER MIND! THANK U!!!:)
*January 17, 2012*

**math**

how do u get 24
*January 17, 2012*

**math**

10z-8+2z-16=36 z=?
*January 17, 2012*

**English**

Is it "'un-acknowledged" or "unacknowledged" or neither of these and there is no such word? (I'm trying to write an essay.) Thanks!
*December 13, 2011*

**English/Commas**

Yes, I seem them now and have a better understanding. Thank you!
*December 13, 2011*

**English/Commas**

Okay, thank you! Are all of the commas placed in the correct spots?
*December 13, 2011*

**English/Commas**

Here is another try. I am not sure about number two, if it is, I added another comma in front of the name. 1. As I understand it, John Pearson, has lived in Winston Colorado, a small almost unknown tourist resort since August 10, 2002. 2. I have some roses planted, Mrs. Roper...
*December 13, 2011*

**English/Commas**

I was asked to put all the commas in the correct place for each sentence. I am unsure about some. Are these correct? Thanks 1. As I understand it, John Pearson has lived in Winston Colorado, a small almost unknown tourist resort since August 10, 2002. 2. I have some roses ...
*December 13, 2011*

**English/Grammar**

I was told to write a paragraph with less than 100 words. The paragraph below has 94 words. I will only receive points if there are NO grammar or punctuation errors. Are there any errors in my paragraph below? Thanks. The new library being constructed costs over forty million ...
*December 8, 2011*

**Calc 3**

Find the volume of the wedge-shaped region contained in the cylinder x^2 + y^2 = 1 and bounded above by the plane z = x and below by the xy-plane. The picture is a cylinder with a diagonal plane through it creating a wedge. Thanks! ;)
*November 29, 2011*

**chemistry**

Calculate the pH of an aqueous solution containing 1.6 x 10-2 M HCl, 2.0 x 10-2 M H2SO4, and 1.8 x 10-2 M HCN.
*November 19, 2011*

**Physics**

A 822 kg car accelerates from rest to 101 km/h in 1.15s. What change in momentum does the force produce?
*November 16, 2011*

**Sentences**

Are my sentences correct with the following directions? (Sentences below directions) Using California as a topic, number and write one example of each of the following: 1. A completely correct simple sentence with an appositive in it. 2. A sentence with redundant language. ...
*November 3, 2011*

**English**

Thank you!
*October 27, 2011*

**English**

Thank you! I'm telling your Marge, if Carol has another party this month I will have to buy a new dress and a new pair of shoes, the kind i can also wear for other occasions. When i saw her last night she said she was too tired for another social even, another evening of ...
*October 27, 2011*

**English**

INSERTS COMMA'S AS NEEDED IN THE FOLLOWING PARAGRAPHS: I'm telllling you Marge if Carol has another party this month i will have to buy a new dress anda new pair of shoes the kind I can also wear for other occasions. WHen i saw her last night she said she was too tired...
*October 27, 2011*

**Math**

For what values of x will the angle be acute? (2x-6)degrees
*October 25, 2011*

**Math**

TriangleFGH is an obtuse triangle. The greatest angle in the triangle has a measure of (6d)degrees. What are the possible values of "d"?
*October 25, 2011*

**Math**

I think this may be right. 1,1,4,3,9,6,16,10,25,15,36,21,49,28,64,36,etc 1+2=3 3+3=6 6+4=10 10+5=15 15+6=21 21+7=28 28+8=36
*October 25, 2011*

**Math**

using the numbers 2.3.4.and 6once to make each equation correct. __+{___x___}x___=30
*October 25, 2011*

**math**

The stopping distance of a car traveling 25mph is 61.7ft, and for a car traveling 35mph it is 106ft. The stopping distance in feet can be described by the equation y=ax^2 + bx + c, where x is the speed in mph. Find the values of a and b.
*October 21, 2011*

**Math**

Yes it is reasonable because 293=290 and 44=50 and 290 - 40 _____ 250 = means rounds to
*October 10, 2011*

**math**

use the given advertisement to determine the missing part in each ratio. Write the two unit rates. yogurts 4 packs equals $5.00 question: 4 yogurts equals $5.00 total = 1 yogurt equals $1.25 each = what amount can you get for $1.00
*October 6, 2011*

**math**

Use the givem advertisement to determine the missing part in each ratio. write the two unit rates. yogurt 4 packs/$5.00 =4 yogurts/$5.00=1 yogurt/?=?/$1.00
*October 6, 2011*

**chemistry**

A solid substance P is soluble in water (1g/ 100mL) at 25°C and 10g/ 100mL of water at 100°C. You are given a sample that contains 10g of P and 2g of impurity G. Describe the procedure to purify P if G is insoluble in water.
*October 6, 2011*

**chemistry**

sorry, i actually posted it by accident. thank you for your help
*October 6, 2011*

**chemistry**

A solid substance P is soluble in water (1g/ 100mL) at 25°C and 10g/ 100mL of water at 100°C. You are given a sample that contains 10g of P and 2g of impurity G. Describe the procedure to purify P if G is insoluble in water.
*October 6, 2011*

**chemistry**

A solid substance P is soluble in water (1g/100 mL) at 25 degrees and 10g/100mL of water at 100 degrees. You are given a sample that contains 10 g of P and 2g of impurity G. If G has the same solubility as P, describe how you could purify P.
*October 6, 2011*

**Arrays and Expanded Algorithm**

how do you 4th grade kids do arrays and an expanded algorithm math fpr homework
*September 22, 2011*

**literary**

what literacy device is used in the statement? former indonesian president suharto was sometimes referred to as a puppet master.
*September 21, 2011*

**math HELP!!**

help
*September 20, 2011*

**math**

writing numbers in standard form ex 624
*September 17, 2011*

**Math 6**

What is the expanded form using powers of 10 and using exponents of 7,375?
*September 8, 2011*

**Math 6th grade**

42.1
*September 6, 2011*

**MAth**

ONE DIRECTION
*August 31, 2011*

**Mathematical Applications**

For the life of me, I cannot understand this question! Will someoe please help me, explain to me how I can solve it, PLEASE! Q- a party supplies store recorded net sles of $423,400 for he year.The store's beginnng iventory at retail was $105,850 andits ending inventory at ...
*August 28, 2011*

**5TH grade math**

estimate each sum or differnce. 7.4 + 3.1+ 9.8 How do I do this?
*August 25, 2011*

**Math**

A box in the shape of a rectangular prism has a volume of 56 cubic inches. If the length of each side is multiplied by 2, what will be the approximate voume of the resulting box?
*August 25, 2011*

**math**

thousands
*August 24, 2011*

**Math**

coach byrd gives 7 lessons a day . how many days will it take him to give 100 lessons? please HELP!!!
*August 15, 2011*

**math**

The length of the smaller rectangle at the right is 1 inch less than twice its width. Both the dimensions of the larger rectangle are 2 inches longer than the smaller rectangle. The area of the shaded region is 86 square inches. What are the dimensions of the smaller rectangle?
*August 4, 2011*

**Nassau**

The length of the smaller rectangle at the right is 1 inch less than twice its width. Both the dimensions of the larger rectangle are 2 inches longer than the smaller rectangle. The area of the shaded region is 86 square inches. What is the area of the larger rectangle?
*August 4, 2011*

**algebra**

I don't understand how to do this problem. Please help! Find an exponential function of the form f(x) = bax that has a y-intercept of 2 and passes through the point (2, 98). For example, if the equation is f(x) = 2(7)x respond by entering the answer as 2(7)^x
*May 19, 2011*

**math**

the washing ton monument is 555ft tall. which is closest to its height? i know the answer is 180 but i do not know how to show work for it!!!HELP!!!
*May 8, 2011*

**science**

How does your body keep from being crushed from air pressure?
*May 3, 2011*

**algebra**

I need help understanding how to do these problems. Thanks! 1) Find the value(s) that would be left out of the range of f. If there is more than one value separate them by commas. Leave fractional answers in fraction form. If there are no values left out of the range respond ...
*May 3, 2011*

**algebra**

How would you go about solving this? Im totally confused. Thanks! Find the value of k such that the graph of f contains the given point. Write k as a simplified fraction if it is not a whole number. f(x) = kx^3 - 3x^2 + kx + 3; (-1, 8)
*April 12, 2011*

**chemistry**

Calculate how many grams of Cu are needed to produce 15L of NO(g). Please help
*April 11, 2011*

**Chemistry**

How many mL of Water are made from 4 moles of HNO3?
*April 11, 2011*

**history**

describe how greek philosophers were different from those that existed in other ancient civilizations. HELP!!!!!!!!!!!!!
*April 10, 2011*

**geometry**

what are the numbers??? otherwise can"t help
*April 10, 2011*

**algebra**

i need help with these problems (either a solution or how to plug them into a graphing calculator): 1) Solve by substitution or elimination 4/x + 1/y + 2/z = 4 2/x + 3/y - 1/z = 1 1/x + 1/y + 1/z = 4 2)Solve the system of equations by substitution. x^2 + y^2 = 25 x - y = 7 3) ...
*April 5, 2011*

**Calc**

-4/45 amp/sec
*March 31, 2011*

**algebra**

A=0.5h^2+2h;30ft^2
*March 27, 2011*

**History**

What was the second most big city state in greece. now the first is sparta but what is the other!!!
*March 23, 2011*

**measurments**

how long is a five k????? Is it 5 kilometers or 5 miles??
*March 22, 2011*

**algebra**

48/p=12. got 576 but not one of the answer chices(p=6,p=36,p=4,p=60 are the choices)
*March 21, 2011*

**math**

X+(X-1)+(2X-5)=24 use X for the amount of outfits Jane has. you know: -that Charlie packs 1 less than Jane (x-1) -that Loretta packs 5 less than twice Jane's (2x-5) -that you can't have more than 24. so set it equal to 24 and then solve :)
*March 16, 2011*

**math**

there are 12 inches in a foot. so divide 5040 by 12 and it should give you the correct number
*March 16, 2011*

**math**

3x+5y-6=0 solve for y
*March 16, 2011*

**Calculus**

a=-0.7650 b=-0.4809
*March 11, 2011*

**Spainish**

Would mi amigos be nostros or ustedes.
*March 7, 2011*

**analogies**

Spruce
*February 23, 2011*

**calculus**

Find the derivative of the following functions: x^7+2/(x^1/2) also (x^9-x^1/7)7^x
*February 17, 2011*

**Calculus**

Find the quadratic polynomial g(x)=ax2+bx+c which best fits the function f(x)=7x at x=0, in the sense that g(0)=f(0), and g'(0)=f'(0), and g''(0)=f''(0).
*February 13, 2011*

**Calculus**

On what intervals is the function f(x)=x^7−7x^6 both decreasing and concave up?
*February 13, 2011*

**math**

i still dont get the anwser but thanks anyway ! :)
*February 10, 2011*

**math**

5 is to 8 as 15 is to (blank) ?
*February 10, 2011*

**Chemistry**

A sample of nitrogen gas occupies 1.55 L at 27oC and 1 atm pressure. What will the volume be at -100oC and the same pressure?
*February 9, 2011*

**Calculus**

Correction: f(x)=ax^n
*February 9, 2011*

**Calculus**

Given a power function of the form f(x)=axn, with f(3)=20 and f(9)=1620, find n and a
*February 9, 2011*

**Calculus**

I meant to put x^7-7x^6
*February 9, 2011*

**physics**

The three ropes are tied to a small, very light ring. Two of the ropes are anchored to walls at right angles, and the third rope pulls as shown: F=85 N, q=54°. What is the magnitude of the tension force in the first rope
*January 31, 2011*

**History**

I need four topics to compare and contrast Machiavelli's The Prince and Castiglione's The Courtier. Thanks.
*January 29, 2011*

**Social studies**

What are the names of the nations in central america?
*January 24, 2011*

**calculus**

Thank you!
*January 24, 2011*

**calculus**

Factor completely x^3 - 5x^2 - x + 5
*January 24, 2011*

**trig/functions**

what does y=2 sin (x-pi/ .5) -1 look like on a graph with the 3 phases of the function?
*January 19, 2011*

**calculus**

Suppose that the sales at Borders bookstores went from 70 million dollars in 1989 to 415 million dollars in 1993. What is the continuous percent growth rate, per year, of sales?
*January 17, 2011*

**math**

Using the formula for the area of a triangle, A = 1/2 bh, find the area of this triangle pictured. The base is 2x + 16 and the height is 4x. I just don't know how to work the problem.
*January 17, 2011*

**5th grade math **

hey i dont like math at all so i was wondering if you can do this below CONSTRUCTING A GRAPH FROM LANDMARKS mode:15 minimum:5 median:10 maximum:20 and i dont even know where to start
*January 4, 2011*

**Chemistry**

its 112g because if you need a total of 200 and they already tell you that the co2 is 88, then subtract 88 from 200 to get 112
*December 18, 2010*

**Life Sciene**

How would the cell theory be affected if scientists could make living cells from carbon, oxygen, and other elements found on earth.
*December 15, 2010*

**fractions**

Mr.shafier has been teaching school for 10 years.For 6 of those years he taught 8th grade.what fraction represents the time Mr.shafier has not been teaching 8th grade?I knoe the answere is 2 5ths. but how do i show work?HELP!!!!!!!!!!!!!!!
*December 12, 2010*